New S60 turbo CRAZY lag, normal? Break in?!?

[The Pope]

Quote:

Originally Posted by NoDestiny So curious, is that type of lag normal? around 3K before really spooling good? I can hold the break and give it gas and get up to 10psi after a few seconds, too. Just want to make sure I did this thing right

Normally you need a little cam or head work to get them to spool faster. My engine would spool the S60 faster than my brothers van could spool a mitsu, full boost before 3,000. But it had a big valve head. I believe a new S60 needs some break in time too and light weight oil to run right. Are you running a mini van later stall converter? The early stall speeds are lower, the mini has a 3,400-3,600 stall. You should be able after a few seconds to foot brake to 15 PSI.

[NoDestiny]

I have a decent port job done no my new G-head, no valve work outside of cleaning and lapping though. The cam is the stock 2.5L roller cam. Stock stall converter.

I am also thinking that a new cal might help as I run VERY rich at lower RPMs to start. Full fuel system upgrade is in order for sure... limiting to 10-13psi at the moment due to stock fuel system

[Oclk Dlux]

From the research I've done with compressor & turbine maps, the S60 makes full boost from 3500-6000.

Turbo and Supercharger Maps

The Garrett GT20 & GT22 turbines are very similar to the T3 .48 & .63 A/R turbines respectively, so you can use their turbine maps. Use Estill's spreadsheet at the bottom of the page to help calculate.

Turbocharger Compressor Calculations

A 3500 stall converter would help, but you'd lose fuel economy. If you need more bottom end, try advance the cam timing 4-6 deg. It'll take from the top end a bit, but who cares, that's when the S60 comes to life. How big is your swingvalve & exhaust? Bigger is better for faster spool-up, especially with that ported exhaust manifold!

May 10th is the first "Night Fever" at Firebird. You going to make it?

[speeduphoria]

Quote:

Originally Posted by NoDestiny I have a decent port job done no my new G-head, no valve work outside of cleaning and lapping though. The cam is the stock 2.5L roller cam. Stock stall converter. I am also thinking that a new cal might help as I run VERY rich at lower RPMs to start. Full fuel system upgrade is in order for sure... limiting to 10-13psi at the moment due to stock fuel system

If you read my post, you will find your answer, as I just read some of your posts to confirm my assumptions.

You performance is going to suck because your using a swirl cal with a G head, G heads love lots of timing an swirl heads dont.

[NoDestiny]

Quote:

Originally Posted by speeduphoria If you read my post, you will find your answer, as I just read some of your posts to confirm my assumptions. You performance is going to suck because your using a swirl cal with a G head, G heads love lots of timing an swirl heads dont.

Thats very good to know. I was looking into a FWD-P Stage 5 cal... think that should do the trick?

Also, I am going to do my best to make it to firebird then!!!

[scott_s]

3" SV and 3" exhaust would help spool it quicker as well.

[GLHNSLHT2]

My 2.5 stock longblock with a 2 piece, and ported exhaust manny, ported 2.5" SV and 3" exhaust starts building boost with the S60 at 2100rpms and by 2500 I have full boost.

[NoDestiny]

Quote:

Originally Posted by GLHNSLHT2 My 2.5 stock longblock with a 2 piece, and ported exhaust manny, ported 2.5" SV and 3" exhaust starts building boost with the S60 at 2100rpms and by 2500 I have full boost.

What head and cal? Auto?

Also, anybody know what I should be running for my base ignition timing?

[The Pope]

GLHNSLHT2 has a great pressure differental and a stock head. He has one of my ported exhast manifolds, runs 2.5" IC lines, 3" air intake and 3" exhaust. I think he runs a 3" TU SV too, can't remember if it was on at the time. So his exhaust pressure is very low to make the boost he wants, which matters greatly. Jay makes his own cals with D cal. 5 speed. I happen to think the under drive pulley and aluminum flywheel make for faster spooling too even though there isn't any air flow reasons.

[NoDestiny]

Thats logical, faster reving engine from less drag should give more velocity of exhaust and just rev up to given RPM sooner.

Something I forgot to mention yesterday: as I drive it, it goes from 5psi-13psi in scale to 3-6K RPM... when it shifts, it drops both RPMs and down to about 7psi boost and climbs again...

[The Pope]

Quote:

Originally Posted by NoDestiny Thats logical, faster reving engine from less drag should give more velocity of exhaust and just rev up to given RPM sooner. Something I forgot to mention yesterday: as I drive it, it goes from 5psi-13psi in scale to 3-6K RPM... when it shifts, it drops both RPMs and down to about 7psi boost and climbs again...

LMAO sounds like a stock like cal in there. Buy FWDs stage computer, it gives 10 PSI at part throttle and gives faster boost climb. The stage 3 with an auto trans is wonderfull to drive. Fast spool up and a smooth powerful climb in speed through the shifts, not that drop in power between shifts and the up and down power delivery. If you run a boost controller it is something different and it is like your turbo leaks in the wastegate or the housing or something

[GLHNSLHT2]

Can anyone read??

Let me Quote "My 2.5 stock longblock with a 2 piece, and ported exhaust manny, ported 2.5" SV and 3" exhaust starts building boost with the S60 at 2100rpms and by 2500 I have full boost."

STOCK LONGBLOCK!! That's head and shortblock. All other mods listed.

Rolling at 35 in 5th and floor it that's when the boost comes on. Roll on it from the same speed that's how the boost comes on, Stomp on it in 1st and by the top of 1st gear the tires start to break loose.

so boost comes on at 2100rpms, and by 2500 except in 1st gear you have full boost.

[NoDestiny]

re... read? Whaaa?

I do have a manual boost controller. The only thing I can think of that was kinda weird on the install was the stainless water supply from TU barely touched the wastegate arm... don't think that would do it though. Ill have to leak test.

[Bobby]

[quote=GLHNSLHT2;1271089]Can anyone read??

Let me Quote "My 2.5 stock longblock with a 2 piece, and ported exhaust manny, ported 2.5" SV and 3" exhaust starts building boost with the S60 at 2100rpms and by 2500 I have full boost."

STOCK LONGBLOCK!! That's head and shortblock. All other mods listed.
[quote]

STOCK LONG BLOCK!! With JE pistons, ARP bolts, ballenced to less than a gram over the RPM range, ported oil feed hole, ballence shafts removed. Stock head and compression though LMAO.

[GLHNSLHT2]

ok yes there's JE's in there but they don't affect how the turbo spools. I don't have lower or higher compression etc.